Merge pull request #191 from edx/jarv/fix-executable

fix typo

playbooks/roles/oraclejdk/tasks/main.yml

@@ -32,7 +32,7 @@
   shell: >
     mkdir -p /usr/lib/jvm && tar -C /usr/lib/jvm -zxvf /var/tmp/{{ oraclejdk_file }} 
     creates=/usr/lib/jvm/{{ oraclejdk_base }}
-    exectuable=/bin/bash 
+    executable=/bin/bash 
 
   sudo: true
   when: oraclejdk_present|failed